US11415956B2 - System and procedure of a bearing arrangement - Google Patents

System and procedure of a bearing arrangement Download PDF

Info

Publication number
US11415956B2
US11415956B2 US16/737,061 US202016737061A US11415956B2 US 11415956 B2 US11415956 B2 US 11415956B2 US 202016737061 A US202016737061 A US 202016737061A US 11415956 B2 US11415956 B2 US 11415956B2
Authority
US
United States
Prior art keywords
control unit
time
chamber
values
grease
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US16/737,061
Other versions
US20200225628A1 (en
Inventor
Per-Erik Larsson
Fredrik Sundquist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF AB
Original Assignee
SKF AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SKF AB filed Critical SKF AB
Publication of US20200225628A1 publication Critical patent/US20200225628A1/en
Application granted granted Critical
Publication of US11415956B2 publication Critical patent/US11415956B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
    • G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
    • G05B23/0235—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/048—Monitoring; Safety
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
    • G06N5/00—Computing arrangements using knowledge-based models
    • G06N5/04—Inference or reasoning models
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/23—Pc programming
    • G05B2219/23399—Adapt set parameter as function of measured conditions

Definitions

  • the invention is related to a system having a bearing arrangement that includes a control unit and a sensor unit, which is able to measure a quantity.
  • the invention is more particularly directed to the system having a bearing arrangement that includes a control unit and a sensor unit being able to measure the quantity water content in grease contained in the bearing arrangement.
  • a system in which a single average of a set of measuring values is used in order to detect a problem of a bearing.
  • the problem is water ingress.
  • a measuring of the level of water contend in grease is known.
  • the object of the invention is in particular to provide a system with an increased effectiveness.
  • a system is suggested with at least one control unit and a bearing arrangement, which comprises at least one sensor unit for measuring a quantity, wherein the system is configured to find out with the help of the at least one sensor unit first values of the quantity in a first time span for a first set of instants of time, wherein the system is configured to infer second values of the quantity for a second set of instants of time from third values measured via the at least one sensor unit in a second time span, wherein the first set of instants of time is different from the second set of instants of time.
  • an increased effectiveness can be achieved.
  • water ingress into a bearing stemming from different sources and occurring on different timescales can be detected very efficiently and effectively.
  • the reliability of the detection of water ingress can be increased.
  • both more or less instantaneous water ingress and also slowly accumulated humidity buildup can be detected very effectively.
  • the robustness of the bearing arrangement can be increased and quite precise information about a point of time of water ingress is obtained. In particular it is easier to find the root cause of water ingress.
  • FIG. 1 shows a schematic section through a system according to the invention
  • FIG. 2 illustrates a schematic section through a further system according to the invention, wherein sensor units are placed outside of a bearing
  • FIG. 1 shows a schematic section through a system according to the invention.
  • the system is given by bearing arrangement 12 which comprises a control unit 10 and a sensor unit 14 which is able to measure a quantity.
  • the quantity is the level of water content in grease contained in the bearing arrangement.
  • the bearing arrangement has an outer ring 16 , an inner ring 18 and rolling elements 20 which touch the outer ring and the inner ring. Furthermore, sealings 22 , 24 seal the space between the inner ring and the outer ring in which the rolling elements are located.
  • the grease is provided in the bearing arrangement in order to facilitate the movement of the rolling elements relative to the outer ring and the inner ring.
  • the rolling elements are balls.
  • the control unit 10 is configured to measure with the help of the sensor unit first values of the quantity during a first time span for a first set of instants of time.
  • the time span is given by an operating duration of the bearing arrangement.
  • the control unit is configured to measure with the help of the sensor unit third values of the quantity in a second time span for a third set of instants of time.
  • the first time span and the second time span are identical. In other embodiments of the invention they can be different. Adjacent instants of time of the first set of instants of time are spaced apart one second. In other words the control unit initiates the measuring in order to get the first values each second.
  • the third set of instants of time is identical to the first set of instants of time. Because of this the third values and the first values are identical.
  • the control unit is configured to infer second values of the quantity for a second set of instants of time from the third values measured via the sensor unit in the second time span. Adjacent instants of time of the second set of instants of time are spaced apart one hour. For each instant of time of the second set of instants of time the control unit gets one of the second values of the quantity by calculating the mean value of the third values of the quantity which were measured in the hour preceding this respective instant of time of the second set of instants of time. In other embodiments of the invention the calculation of the mean value is substituted by finding out the median or by applying another statistical metric.
  • adjacent instants of time of the second set of instants of time are spaced apart other amounts of time than one hour.
  • the control unit is configured to extract a first trend information from the first set and the first values. Moreover, the control unit is configured to extract a second trend information from the second set and the second values.
  • the first trend information is a first trend value and the control unit is configured to emit a signal when the first trend value exceeds a first threshold value and the second trend information is a second trend value and the system is configured to emit a signal when the second trend value exceeds a second threshold value.
  • the emitted signals can be sent from the control unit via radio telecommunication to an alarm unit which displays or rings an alarm in order to indicate that there is a problem with the bearing arrangement.
  • the first trend information is an average of the first values and the second trend information is an average of the second values which lie of course in the past with respect to the evaluating point of time when the second trend information is evaluated.
  • the trend information can also be different quantities, for example a 1 st derivative of an interpolation curve.
  • the control unit can be configured in a way that the second trend information is evaluated at very different points of time and that at each of these points of time the last instant of the second set of instants of time is taken to be the respective point of time at which the second trend information is evaluated. The last aspect might imply that all the second values have to be calculated newly which means that the second trend information is a kind of moving average in this case.
  • the control unit and the sensor unit can receive their energy from battery or also by energy harvesting.
  • control unit can be located outside from the bearing arrangement. Then the communication between the control unit and the sensor unit can be done with radio telecommunication.
  • the second, slower trend is configured to have far lower alarm level compared to the first, quicker trend because it is more reliable.
  • the short trend shows the time when newly injected water was detected by the sensor unit and the long trend shows the amount of water after being mixed with the grease.
  • the humidity in the bearing arrangement can be taken as the quantity.
  • FIG. 2 shows an alternative embodiment.
  • Components, features and functions that essentially remain the same are always numbered with the same reference signs. However, to distinguish between the embodiment, the letter “a” is added to the reference signs of the embodiment in FIG. 2 .
  • the following description is essentially limited to the differences to the embodiment in FIG. 1 , whereby reference can be made to the description of the embodiment in FIG. 1 with regard to components, features and functions that remain the same.
  • FIG. 2 shows a further embodiment according to the invention.
  • a bearing arrangement of the system comprises a housing 28 a at which an outer ring 16 a is fixed.
  • An inner ring 18 a is fixed at a shaft 26 a of the bearing arrangement.
  • the inner ring and the outer ring are part of a bearing of the bearing arrangement.
  • a first sensor unit 14 a and a second sensor unit 15 a are fixed at the housing.
  • a control unit 10 a of the system can use the first sensor unit and/or the second sensor unit to measure a humidity or the level of water content of grease of the bearing.
  • the sensor unit 15 a is not present.
  • the sensor unit 14 a is not present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Evolutionary Computation (AREA)
  • Data Mining & Analysis (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Software Systems (AREA)
  • Computational Linguistics (AREA)
  • Artificial Intelligence (AREA)

Abstract

A system with at least one control unit and a bearing arrangement that includes at least one sensor unit for measuring a quantity. The system is configured to find out with the help of the at least one sensor unit first values of the quantity in a first time span for a first set of instants of time. The system is further configured to infer second values of the quantity for a second set of instants of time from third values measured via the at least one sensor unit in a second time span. The first set of instants of time is different from the second set of instants of time.

Description

CROSS REFERENCE TO RELATED APPLICATIONS
This application claims priority to German patent application no. 102019200439.3, filed on Jan. 16, 2019, the contents 5 of which are fully incorporated herein by reference.
TECHNICAL FIELD OF THE INVENTION
The invention is related to a system having a bearing arrangement that includes a control unit and a sensor unit, which is able to measure a quantity. The invention is more particularly directed to the system having a bearing arrangement that includes a control unit and a sensor unit being able to measure the quantity water content in grease contained in the bearing arrangement.
BACKGROUND OF THE INVENTION
A system is known in which a single average of a set of measuring values is used in order to detect a problem of a bearing. The problem is water ingress. Furthermore, from the patent application GB2559791 a measuring of the level of water contend in grease is known.
SUMMARY OF THE INVENTION
The object of the invention is in particular to provide a system with an increased effectiveness. A system is suggested with at least one control unit and a bearing arrangement, which comprises at least one sensor unit for measuring a quantity, wherein the system is configured to find out with the help of the at least one sensor unit first values of the quantity in a first time span for a first set of instants of time, wherein the system is configured to infer second values of the quantity for a second set of instants of time from third values measured via the at least one sensor unit in a second time span, wherein the first set of instants of time is different from the second set of instants of time.
According to the invention an increased effectiveness can be achieved. In particular water ingress into a bearing stemming from different sources and occurring on different timescales can be detected very efficiently and effectively. In particular the reliability of the detection of water ingress can be increased. Furthermore, both more or less instantaneous water ingress and also slowly accumulated humidity buildup can be detected very effectively. Moreover, the robustness of the bearing arrangement can be increased and quite precise information about a point of time of water ingress is obtained. In particular it is easier to find the root cause of water ingress.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages result from the following drawing description. The drawing shows an example of the invention. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will also consider the features individually and summarize them to meaningful further combinations.
FIG. 1 shows a schematic section through a system according to the invention, and
FIG. 2 illustrates a schematic section through a further system according to the invention, wherein sensor units are placed outside of a bearing
 DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a schematic section through a system according to the invention. The system is given by bearing arrangement 12 which comprises a control unit 10 and a sensor unit 14 which is able to measure a quantity. The quantity is the level of water content in grease contained in the bearing arrangement. The bearing arrangement has an outer ring 16, an inner ring 18 and rolling elements 20 which touch the outer ring and the inner ring. Furthermore, sealings 22, 24 seal the space between the inner ring and the outer ring in which the rolling elements are located. The grease is provided in the bearing arrangement in order to facilitate the movement of the rolling elements relative to the outer ring and the inner ring. In the shown embodiment the rolling elements are balls.
The control unit 10 is configured to measure with the help of the sensor unit first values of the quantity during a first time span for a first set of instants of time. The time span is given by an operating duration of the bearing arrangement. Moreover, the control unit is configured to measure with the help of the sensor unit third values of the quantity in a second time span for a third set of instants of time. The first time span and the second time span are identical. In other embodiments of the invention they can be different. Adjacent instants of time of the first set of instants of time are spaced apart one second. In other words the control unit initiates the measuring in order to get the first values each second. The third set of instants of time is identical to the first set of instants of time. Because of this the third values and the first values are identical.
The control unit is configured to infer second values of the quantity for a second set of instants of time from the third values measured via the sensor unit in the second time span. Adjacent instants of time of the second set of instants of time are spaced apart one hour. For each instant of time of the second set of instants of time the control unit gets one of the second values of the quantity by calculating the mean value of the third values of the quantity which were measured in the hour preceding this respective instant of time of the second set of instants of time. In other embodiments of the invention the calculation of the mean value is substituted by finding out the median or by applying another statistical metric.
In alternative embodiments of the invention adjacent instants of time of the second set of instants of time are spaced apart other amounts of time than one hour.
The control unit is configured to extract a first trend information from the first set and the first values. Moreover, the control unit is configured to extract a second trend information from the second set and the second values. The first trend information is a first trend value and the control unit is configured to emit a signal when the first trend value exceeds a first threshold value and the second trend information is a second trend value and the system is configured to emit a signal when the second trend value exceeds a second threshold value. The emitted signals can be sent from the control unit via radio telecommunication to an alarm unit which displays or rings an alarm in order to indicate that there is a problem with the bearing arrangement. The first trend information is an average of the first values and the second trend information is an average of the second values which lie of course in the past with respect to the evaluating point of time when the second trend information is evaluated. Of course in other embodiments of the invention the trend information can also be different quantities, for example a 1st derivative of an interpolation curve. In an alternative embodiment of the invention the control unit can be configured in a way that the second trend information is evaluated at very different points of time and that at each of these points of time the last instant of the second set of instants of time is taken to be the respective point of time at which the second trend information is evaluated. The last aspect might imply that all the second values have to be calculated newly which means that the second trend information is a kind of moving average in this case.
The control unit and the sensor unit can receive their energy from battery or also by energy harvesting.
In other embodiments of a system according to the invention the control unit can be located outside from the bearing arrangement. Then the communication between the control unit and the sensor unit can be done with radio telecommunication.
By using a first and a second trend information it is avoided to use only a single average in order to detect water ingress which is either too fast or too noisy in order to initiate a reliable alarm or too slow to detect small events of water ingress.
The second, slower trend is configured to have far lower alarm level compared to the first, quicker trend because it is more reliable. Generally the short trend shows the time when newly injected water was detected by the sensor unit and the long trend shows the amount of water after being mixed with the grease.
Instead of the level of water content in the grease also the humidity in the bearing arrangement can be taken as the quantity. By separating the measurement in slow and quick trend it is possible to detect free water particles before they are mixed with the grease.
It is also possible to use instead of one time span more time spans for additional alarm response times.
FIG. 2 shows an alternative embodiment. Components, features and functions that essentially remain the same are always numbered with the same reference signs. However, to distinguish between the embodiment, the letter “a” is added to the reference signs of the embodiment in FIG. 2. The following description is essentially limited to the differences to the embodiment in FIG. 1, whereby reference can be made to the description of the embodiment in FIG. 1 with regard to components, features and functions that remain the same.
FIG. 2 shows a further embodiment according to the invention. A bearing arrangement of the system comprises a housing 28 a at which an outer ring 16 a is fixed. An inner ring 18 a is fixed at a shaft 26 a of the bearing arrangement. The inner ring and the outer ring are part of a bearing of the bearing arrangement. A first sensor unit 14 a and a second sensor unit 15 a are fixed at the housing. A control unit 10 a of the system can use the first sensor unit and/or the second sensor unit to measure a humidity or the level of water content of grease of the bearing. In an alternative embodiment the sensor unit 15 a is not present. In a further alternative embodiment the sensor unit 14 a is not present.

Claims (11)

The invention claimed is:
1. A system with a control unit and a bearing arrangement, the system comprising:
an inner ring;
an outer ring which in combination with the inner ring defines a chamber;
a plurality of rolling elements located in the chamber between the inner ring and the outer ring;
a seal disposed between the inner ring and the outer ring;
a grease located in the chamber;
the control unit being disposed on the inner ring and being axially located between the seal and the plurality of rolling elements;
a sensor unit for measuring a quantity of water in the grease in the chamber, wherein the sensor unit is located adjacent to the control unit;
the sensor unit communicating to the control unit the quantity of water in the grease in the chamber such that the control unit is configured to correlate a plurality of first values of the quantity of water in the grease in the chamber taken at a first set of instants of time within a first time span;
the control unit is configured to calculate a plurality of second values of the quantity of water in the grease in the chamber as calculated for each of the first set of instants of time within the first time span, each of the plurality of second values being the average of the quantity of the water in the grease in the chamber for a predetermined preceding amount of time wherein the control unit automatically extracts a first trend information from the plurality of first values.
2. The system of claim 1, wherein the control unit automatically extracts a second trend information from the plurality of second values.
3. The system of claim 1, wherein the first trend information is a first trend value and the control unit is configured to emit a signal when the first trend value exceeds a first threshold value.
4. The system of claim 2, wherein the first trend information is a first trend value and the control unit is configured to emit a signal when the first trend value exceeds a first threshold value, the second trend information is a second trend value and the control unit is configured to emit a second signal when the second trend value exceeds a second threshold value.
5. The system of claim 1, wherein the second trend information is an average of the plurality of second values, wherein the a predetermined preceding amount of time is one hour.
6. The system of claim 1, wherein each of the plurality of second values is taken at a separate one of a second set of instants of time within the predetermined preceding amount of time, the second set of instants of time are spaced apart between one and one thousand hours and the first set of instants of time are spaced apart between one second and ten minutes.
7. The system of claim 1, wherein the sensor unit can also collect data that is provided to the control unit to determine the humidity contained in the bearing arrangement.
8. The system of claim 1, wherein the first set of instants of time are spaced apart by one second.
9. The system of claim 1, wherein the predetermined preceding amount of time is one hour.
10. The system of claim 1, wherein the sensor unit is configured to also measure the humidity contained in the bearing arrangement.
11. A procedure, executed by a system having a control unit and a bearing arrangement, the system comprising:
an inner ring;
an outer ring which in combination with the inner ring defines a chamber;
a plurality of rolling elements located in the chamber between the inner ring and the outer ring;
a seal disposed between the inner ring and the outer ring;
a grease located in the chamber;
the control unit being disposed on the inner ring and being axially located between the seal and the plurality of rolling elements;
a sensor unit for measuring a quantity of water located in the grease in the chamber, wherein the sensor unit is located adjacent to the control unit;
the sensor unit communicating to the control unit the quantity of water in the grease in the chamber to the control unit such that the control unit is configured to correlate a plurality of first values of the quantity of water in the grease in the chamber taken at a first set of instants of time within a first time span;
the control unit is configured to calculate a plurality of second values of the quantity of water in the grease in the chamber as calculated for each of the first set of instants of time within the first time span, each of the plurality of second values being the average of the quantity of the water present in the grease in the chamber for a predetermined preceding amount of time;
the control unit automatically extracts a first trend information from the plurality of first values, wherein the first trend information is the first trend value and the control unit is configured to emit a signal when the first trend value exceeds a first threshold value;
the control unit automatically extracts the second trend information from the plurality of second values, wherein the second trend information is a second trend value and the control unit is configured to emit a second signal when the second trend value exceeds a second threshold value.
US16/737,061 2019-01-16 2020-01-08 System and procedure of a bearing arrangement Active 2041-01-08 US11415956B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019200439.3A DE102019200439A1 (en) 2019-01-16 2019-01-16 System and procedure
DE102019200439.3 2019-01-16

Publications (2)

Publication Number Publication Date
US20200225628A1 US20200225628A1 (en) 2020-07-16
US11415956B2 true US11415956B2 (en) 2022-08-16

Family

ID=71131790

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/737,061 Active 2041-01-08 US11415956B2 (en) 2019-01-16 2020-01-08 System and procedure of a bearing arrangement

Country Status (3)

Country Link
US (1) US11415956B2 (en)
CN (1) CN111442924B (en)
DE (1) DE102019200439A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019209605A1 (en) 2019-07-01 2021-01-07 Aktiebolaget Skf Device for detecting a defect in a rotating assembly
DE102019209606A1 (en) * 2019-07-01 2021-01-07 Aktiebolaget Skf Device for detecting a defect in a rotating assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010037685A1 (en) * 2000-04-19 2001-11-08 Jens Bode Method and device for monitoring a bearing arrangement
US20090103843A1 (en) * 2007-10-20 2009-04-23 Rolls-Royce Plc Bearing arrangement
US20100166352A1 (en) * 2006-06-23 2010-07-01 Koichi Morita Bearing apparatus
US20150247529A1 (en) * 2012-09-19 2015-09-03 Siemens Aktiengesellschaft Bearing arrangement and method for determining the load zone of a bearing
US20160178122A1 (en) * 2014-12-23 2016-06-23 Lincoln Industrial Corporation Method of controlling bearing lubrication system
GB2559791A (en) 2017-02-20 2018-08-22 Skf Ab A method and system of condition monitoring

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008286662A (en) * 2007-05-18 2008-11-27 Ntn Corp Device and method for testing bearing
CN101819093A (en) * 2010-03-31 2010-09-01 桂林电子科技大学 Fault diagnosis device for spindle bearing of roadheader cutting head and use method thereof
US8441149B2 (en) * 2010-06-25 2013-05-14 Intel Corporation Distributed power delivery scheme for on-die voltage scaling
EP2841906A1 (en) * 2012-04-24 2015-03-04 Aktiebolaget SKF Bearing monitoring method and system
CN103743565B (en) * 2013-12-18 2016-08-17 南京理工大学 Angular contact ball bearing temperature, Axial Thermal displacement tester and experimental technique
CN105840669B (en) * 2015-01-29 2020-03-27 斯凯孚公司 System for mounting an annular component on a shaft
GB2536711B (en) * 2015-03-27 2018-06-27 Skf Ab Capacitance measurement in a bearing housing
CN204882072U (en) * 2015-05-29 2015-12-16 苏州欧弗贝传动科技有限公司 High -speed load dynamic pressure test system
EP3150875A1 (en) * 2015-09-30 2017-04-05 Aktiebolaget SKF Bearing cage with antenna and method for detecting failure of a bearing cage
FR3042612B1 (en) * 2015-10-14 2020-12-11 Airbus Operations Sas METHOD AND DEVICE FOR DETECTION OF OSCILLATORY FAILURES IN A SLAVE CHAIN IN POSITION OF AN AIRCRAFT RUDDER.
US10288525B2 (en) * 2015-10-20 2019-05-14 Hyperloop Technologies, Inc. Bearing testing apparatus and method
CN105445025B (en) * 2015-11-13 2018-02-06 重庆奔腾科技发展有限公司 Water lubrication radial thrust Assembled sliding bearing performance experimental bench

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010037685A1 (en) * 2000-04-19 2001-11-08 Jens Bode Method and device for monitoring a bearing arrangement
US20100166352A1 (en) * 2006-06-23 2010-07-01 Koichi Morita Bearing apparatus
US20090103843A1 (en) * 2007-10-20 2009-04-23 Rolls-Royce Plc Bearing arrangement
US20150247529A1 (en) * 2012-09-19 2015-09-03 Siemens Aktiengesellschaft Bearing arrangement and method for determining the load zone of a bearing
US20160178122A1 (en) * 2014-12-23 2016-06-23 Lincoln Industrial Corporation Method of controlling bearing lubrication system
GB2559791A (en) 2017-02-20 2018-08-22 Skf Ab A method and system of condition monitoring

Also Published As

Publication number Publication date
US20200225628A1 (en) 2020-07-16
CN111442924A (en) 2020-07-24
DE102019200439A1 (en) 2020-07-16
CN111442924B (en) 2025-01-07

Similar Documents

Publication Publication Date Title
US6845468B2 (en) Aircraft fault monitoring system and method
US9140758B2 (en) Method and device for indicating an electric discharge inside a bearing of an electric drive system
US10115298B2 (en) Method of trend analysis and automatic tuning of alarm parameters
US11415956B2 (en) System and procedure of a bearing arrangement
US4669315A (en) Rotating machinery diagnosis system with acoustic emission technique
CN109285313B (en) Automatic sensor correction method and system for smoke alarm
US8259002B2 (en) Radar altimeter antenna performance monitoring via reflected power measurements
US20170249819A1 (en) Fire Monitoring System and Smoke Detector
US10111609B2 (en) Method for detecting a malfunction of a sensor for measuring an analyte concentration in vivo
MX2021015166A (en) Gas sensor with separate contaminant detection element.
US9269206B2 (en) System for monitoring a measurement chain of a turbojet engine
EP2498070B1 (en) Flow rate measurement device
JP2019515701A5 (en)
WO2019074712A3 (en) Performance based condition monitoring
US11592523B2 (en) Method and apparatus for processing a radar range doppler matrix using a pseudorandom noise detection threshold
US6786635B2 (en) Turbine blade (bucket) health monitoring and prognosis using neural network based diagnostic techniques in conjunction with pyrometer signals
CN106672722B (en) Machinery diagnosis device, machinery diagnosis method and machinery diagnosis system
JPWO2018066041A1 (en) Performance abnormality detection device, performance abnormality detection method, and performance abnormality detection program
CN110971488A (en) Data processing method, device, server and storage medium
CN118328890A (en) Compensation method and device for laser attenuation, electronic equipment and storage medium
CN109564720A (en) The control method of automatic inspection system, automatic inspection system check object reading device and automatic inspection system
CN116298719A (en) Equipment insulation aging identification method, device, electronic equipment and storage medium
CA2425244A1 (en) Method for reduction of the statistical measurement times in the field of radioactivity measurement
JP6042467B2 (en) Bearing condition monitoring method and bearing condition monitoring apparatus
US12480903B2 (en) Liquid state detection sensor

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STPP Information on status: patent application and granting procedure in general

Free format text: APPLICATION DISPATCHED FROM PREEXAM, NOT YET DOCKETED

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: AWAITING TC RESP., ISSUE FEE NOT PAID

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4